CPC B06B 1/067 (2013.01) [G01N 29/245 (2013.01); G01N 29/28 (2013.01); G10K 11/02 (2013.01); H10N 30/8554 (2023.02); H10N 30/883 (2023.02)] | 18 Claims |
1. An ultrasonic device, comprising:
a transducer having a piezoelectric element therein;
a first acoustic matching layer comprising polyethersulfone (PES), on the piezoelectric element; and
a polymer protective layer on said first acoustic matching layer.
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